Advanced System care by IObit seems like good free software for keeping personal computers running fairly quickly. It is free to download and install though there is an option for a pro version that costs about $24 dollars a year for three computers.
It has a surprising number of quality features along with options to install other free IObit software that is very useful including Driver Booster. That program updates drivers on the computer. It is very useful in locating drivers on-line for items like TP-Link range boosters.
For those that can’t afford establishment anti-virus software like Norton, Advanced System Care has the most practical and functional of the free software for computer security.